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Forskningsartikel - Refereegranskat, 2022

Elevating Air Temperature May Enhance Future Epidemic Risk of the Plant Pathogen Phytophthora infestans

Wu, E-Jiao; Wang, Yan-Ping; Yang, Li-Na; Zhao, Mi-Zhen; Zhan, Jiasui


Knowledge of pathogen adaptation to global warming is important for predicting future disease epidemics and food production in agricultural ecosystems; however, the patterns and mechanisms of such adaptation in many plant pathogens are poorly understood. Here, population genetics combined with physiological assays and common garden experiments were used to analyze the genetics, physiology, and thermal preference of pathogen aggressiveness in an evolutionary context using 140 Phytophthora infestans genotypes under five temperature regimes. Pathogens originating from warmer regions were more thermophilic and had a broader thermal niche than those from cooler regions. Phenotypic plasticity contributed -10-fold more than heritability measured by genetic variance. Further, experimental temperatures altered the expression of genetic variation and the association of pathogen aggressiveness with the local temperature. Increasing experimental temperature enhanced the variation in aggressiveness. At low experimental temperatures, pathogens from warmer places produced less disease than those from cooler places; however, this pattern was reversed at higher experimental temperatures. These results suggest that geographic variation in the thermal preferences of pathogens should be included in modeling future disease epidemics in agricultural ecosystems in response to global warming, and greater attention should be paid to preventing the movement of pathogens from warmer to cooler places.


natural selection; AUDPC; ecological sustainability; thermal adaptation; plant disease; pathogen evolution; counter-gradient variation

Publicerad i

Journal of Fungi
2022, Volym: 8, nummer: 8, artikelnummer: 808
Utgivare: MDPI

    Associerade SLU-program

    SLU Plant Protection Network

    Globala målen

    SDG13 Climate action
    SDG2 Zero hunger

    UKÄ forskningsämne

    Agricultural Science
    Climate Research

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